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A Study on the Distortional Analysis of Curved Steel Box Girders and Determination of Diaphragm Spacing  

Koo, Min Se (인하대학교 토목공학과)
Yoon, Wo Hyun (경원대학교 환경정보대학원)
Lee, Ho Kyoung (인하대학교 토목공학과)
Kim, Dae Hong (청석엔지니어링 구조부)
Publication Information
Journal of Korean Society of Steel Construction / v.15, no.2, 2003 , pp. 125-135 More about this Journal
Abstract
A 3-dimensional model of curved steel box girder bridges without diaphragm was presented. This model yielded results that were consistent with those of the parameter analysis using the BEF and Ritz methods. Se veralmodels with diaphragms were analyzed to estimate the appropriate diaphragm spacing. In case of 50m span, models A-10, A-20, A-30, B-10, B-20, and B-30 were found to have 5(8.3m), 7(6.25m), 8(5.5m), 4(10m), 6(7.1m), and 7(6.25m) diaphragms, respectively. In addition, a formula that presents the ratio of distortional stress to bending stresswas created from the results of the 3-dimensional FEM model analysis.
Keywords
Diaphram; Diaphram Spacing; Steel Box; Curved Steel Box; Warping;
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